The invention discloses a urethra valve driven by ultrasound vaporization steam. The urethra valve driven by the ultrasound vaporization steam comprises a sound head, a first driving bag, first working media, a valve body, a valve plug, a first permanent magnet, a first rubber gasket, an urethra, a second permanent magnet and a second rubber gasket, wherein the sound head is pressed on the abdomen front wall in a handheld mode, the valve body is fixed to the pubis, the valve plug is made of non-metal materials, and is installed in a valve cavity formed in the valve body, the first driving bag is a pneumatic driver which is made of flexible and elastic materials, and is installed in the valve cavity formed in the valve body, the first working media are low-boiling-point liquid, and are stored in the closed first driving bag, the first permanent magnet and the second permanent magnet are installed on the two sides of the urethra respectively, the magnetism of the first permanent magnet is opposite to the magnetism of the second permanent magnet, the first permanent magnet is fixedly connected with the valve plug, the second permanent magnet is fixedly connected with the valve body, the first rubber gasket is fixedly connected with the first permanent magnet, and the second rubber gasket is fixedly connected with the second permanent magnet. The urethra valve driven by the ultrasound vaporization steam is a human body auxiliary instrument which is free of infection, damage and urine leakage.